[Xen-bugs] [Bug 953] New: Xen0 hang sometimes & a lot of calltraces will be printed on serial

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=953

           Summary: Xen0 hang sometimes & a lot of calltraces will be
                    printed on serial
           Product: Xen
           Version: unstable
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: yunfeng.zhao@xxxxxxxxx


Environment:
------------
Service OS (ia32/ia32e/IA64):IA32e 
Guest OS (ia32/ia32e/IA64): 
Change Set: 14756
Hardware: woodcrest



Bug detailed description:
--------------------------

xen0 hang sometimes when I run nightly testing, but I can ping it, can not
login in by ssh, and 
also can not login in by physical console. The serial output tell us that it is
a bug. 
Reproduce steps:
----------------
1. run nightly testing

Current result:
----------------


Expected result:
----------------


Basic root-causing log:
----------------------
BUG: soft lockup detected on CPU#1!

Call Trace:
 <IRQ> [<ffffffff802583b5>] softlockup_tick+0xcc/0xde
 [<ffffffff8020e851>] timer_interrupt+0x3a3/0x401
 [<ffffffff802589e4>] handle_IRQ_event+0x4b/0x93
 [<ffffffff80258aca>] __do_IRQ+0x9e/0x100
 [<ffffffff8020cc9b>] do_IRQ+0x63/0x71
 [<ffffffff8034b8a7>] evtchn_do_upcall+0xee/0x165
 [<ffffffff8020abca>] do_hypervisor_callback+0x1e/0x2c
 <EOI> [<ffffffff802063aa>] hypercall_page+0x3aa/0x1000
 [<ffffffff802063aa>] hypercall_page+0x3aa/0x1000
 [<ffffffff8020ef27>] raw_safe_halt+0xb7/0xdd
 [<ffffffff802082c3>] xen_idle+0x67/0x79
 [<ffffffff8020837f>] cpu_idle+0xaa/0xc


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